US9392585B2 - Base station, communication method and program - Google Patents

Base station, communication method and program Download PDF

Info

Publication number
US9392585B2
US9392585B2 US14/364,445 US201214364445A US9392585B2 US 9392585 B2 US9392585 B2 US 9392585B2 US 201214364445 A US201214364445 A US 201214364445A US 9392585 B2 US9392585 B2 US 9392585B2
Authority
US
United States
Prior art keywords
frame
configuration
base station
type
configurations
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active, expires
Application number
US14/364,445
Other languages
English (en)
Other versions
US20140301349A1 (en
Inventor
Hiroaki Takano
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sony Corp
Original Assignee
Sony Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sony Corp filed Critical Sony Corp
Assigned to SONY CORPORATION reassignment SONY CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: TAKANO, HIROAKI
Publication of US20140301349A1 publication Critical patent/US20140301349A1/en
Application granted granted Critical
Publication of US9392585B2 publication Critical patent/US9392585B2/en
Active legal-status Critical Current
Adjusted expiration legal-status Critical

Links

Images

Classifications

    • H04W72/0406—
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0078—Avoidance of errors by organising the transmitted data in a format specifically designed to deal with errors, e.g. location
    • H04L1/0086—Unequal error protection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0058—Allocation criteria
    • H04L5/0073—Allocation arrangements that take into account other cell interferences
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/042—Public Land Mobile systems, e.g. cellular systems
    • H04W84/045—Public Land Mobile systems, e.g. cellular systems using private Base Stations, e.g. femto Base Stations, home Node B

Definitions

  • Japan Patent Application No. 2011-288780 titled “BASE STATION, COMMUNICATION METHOD, AND PROGRAM,” filed Dec. 28, 2011.
  • the present disclosure relates to a base station, a communication method, and a program.
  • LTE Long Term Evolution
  • RRH Remote Radio Heads
  • pico eNodeBs or the like.
  • next generation wireless communication is disclosed in, for example, JP 2011-521512A.
  • ABS Almost Blank Subframe
  • An ABS is a subframe which limits transmission other than a reference signal from a macro eNodeB in some subframes, or a subframe in which transmission other than a reference signal from a macro eNodeB is limited.
  • a subframe set as an ABS may reduce interference with respect to a received signal of a user equipment (UE) belonging to a pico eNodeB located within a cell a macro eNodeB provides. Also, setting the same subframe between neighboring macro eNodeBs has been proposed.
  • UE user equipment
  • multiple_ABS technology for permitting the setting of different ABSs between macro eNodeBs has been discussed. If multiple_ABS is introduced, macro eNodeBs setting the same subframe as the ABS and macro eNodeBs not setting the same subframe as the ABS are mixed among a plurality of neighboring macro eNodeBs. As a result, even in subframes which are set as ABSs by a macro eNodeB, a received signal of a UE belonging to a pico eNodeB may receive interference from neighboring macro eNodeBs.
  • the present disclosure proposes a new and improved base station, communication method, and program, which can appropriately determine a protection status from interference of each communication frame.
  • Whether an ABS configuration is well-suited to a particular cell or area may depend on the number of communication terminals in that cell or area.
  • one advantage of multiple_ABS technology is that it allows macro eNodeBs to use different ABS configurations in different cells or areas, which protects communication terminals from interference without unduly limiting the terminals' communication throughput.
  • the use of multiple_ABS technology gives rise to a scenario in which one or more base stations near a terminal treat a given subframe as an ABS, while one or more other base stations near the terminal do not treat the subframe as an ABS.
  • the terminal may experience some interference associated with the subframe.
  • Some aspects of the present disclosure relate to techniques for determining, at a base station, an interference protection status for a communication control device associated with the base station.
  • some aspects of the present disclosure relate to transmitting information from the base station to the communication control device in a format that is backward compatible with existing techniques for transmitting information from a base station to a communication control device.
  • a method which includes, with a processor of a base station, determining an interference protection status of a frame based at least in part on information indicating configurations of base stations, wherein a first of the configurations differs from at least a second of the configurations, and wherein a portion of the information indicating the second of the configurations is received from a second base station.
  • a base station including an interference determination unit configured to determine an interference protection status of a frame based at least in part on information indicating configurations of two or more base stations, wherein a first of the configurations differs from at least a second of the configurations, and wherein a portion of the information indicating the second of the configurations is received from a second base station.
  • a computer-readable medium having recorded thereon a computer program which, when executed by at least one processing unit, performs a method including determining an interference protection status of a frame based at least in part on information indicating configurations of base stations, wherein a first of the configurations differs from at least a second of the configurations, and wherein a portion of the information indicating the second of the configurations is received from a second base station.
  • a wireless communication system including a first base station and a second base station.
  • the first base station includes an interference determination unit.
  • the first base station is configured to store information indicating a first configuration.
  • the second base station is configured to store information indicating a second configuration.
  • the interference determination unit of the first base station is configured to determine an interference protection status of a frame based at least in part on the information indicating the first configuration of the first base station and the information indicating the second configuration of the second base station, and the first configuration differs from the second configuration.
  • a protection status from interference of each communication frame can be appropriately determined.
  • FIG. 1 is an explanatory diagram illustrating a configuration of a communication system according to an embodiment of the present disclosure.
  • FIG. 2 is an explanatory diagram illustrating a 4G frame format.
  • FIG. 3 is an explanatory diagram illustrating a range expansion area of a pico eNodeB 30 .
  • FIG. 4 is an explanatory diagram illustrating a subframe set as an ABS.
  • FIG. 5 is an explanatory diagram illustrating a subframe set as an MBSFN type ABS.
  • FIG. 6 is an explanatory diagram illustrating specific examples of configurations.
  • FIG. 7 is a functional block diagram illustrating a configuration of an eNodeB according to a first embodiment of the present disclosure.
  • FIG. 8 is an explanatory diagram illustrating a specific example of a determination by an interference determination unit.
  • FIG. 9 is a flowchart illustrating an operation of an eNodeB according to a first embodiment of the present disclosure.
  • FIG. 10 is an explanatory diagram illustrating a modified example of a determination by an interference determination unit.
  • FIG. 11 is a flowchart illustrating an operation of an eNodeB according to the modified example.
  • FIG. 12 is an explanatory diagram illustrating an application example of the first embodiment.
  • FIG. 13 is a functional block diagram illustrating a configuration of an eNodeB according to a second embodiment of the present disclosure.
  • FIG. 14 is an explanatory diagram illustrating an example of an arrangement of an eNodeB and a pico eNodeB.
  • FIG. 15 is a flowchart illustrating an operation of an eNodeB according to a second embodiment of the present disclosure.
  • FIG. 16 is an explanatory diagram illustrating a configuration of a pico eNodeB according to a third embodiment of the present disclosure.
  • FIG. 17 is a functional block diagram illustrating a configuration of a UE 20 according to a third embodiment of the present disclosure.
  • FIG. 18 is an explanatory diagram illustrating a specific example of signal quality measurement according to a third embodiment of the present disclosure.
  • FIG. 19 is an explanatory diagram illustrating an application example of the signal quality measurement.
  • FIG. 20 is a sequence diagram illustrating an operation of a communication system according to a third embodiment of the present disclosure.
  • a plurality of elements that have substantially the same function and structure are distinguished from one another by assigning different letters after the same reference signs.
  • a plurality of configurations that have substantially the same functional configuration are distinguished such as in UEs 20 A, 20 B and 20 C.
  • the common reference sign alone is assigned thereto.
  • the UEs 20 A, 20 B and 20 C need not be especially distinguished from one another, they are simply referred to as the UEs 20 .
  • FIG. 1 is an explanatory diagram illustrating a configuration of a communication system according to an embodiment of the present disclosure.
  • a communication system according to an embodiment of the present disclosure includes a plurality of eNodeBs 10 , a plurality of user equipment devices (UEs) 20 , and a plurality of pico eNodeBs 30 .
  • UEs user equipment devices
  • the eNodeB 10 is a radio base station that communicates with the UE 20 included in a cell provided by the eNodeB 10 , that is, coverage of the eNodeB 10 (in this specification, unless specifically described otherwise, the eNodeB 10 represents a macro eNodeB).
  • the eNodeB 10 has enough high power output to form a cell of several km to about 10 km.
  • each eNodeB 10 is connected through a cable, called an X2 interface, and may communicate control data or user data with other eNodeBs 10 through the X2 interface.
  • the pico eNodeB 30 is a low-transmission-power type communication control apparatus that has a transmission power lower than that of the eNodeB 10 by, for example, about 10 dB. Therefore, the pico eNodeB 30 forms a smaller cell than the eNodeB 10 within a cell formed by the eNodeB 10 .
  • the pico eNodeB 30 controls communication with the UE 20 belonging to the pico eNodeB 30 .
  • the pico eNodeB 30 is connected to the eNodeB 10 by the X2 interface, and may communicate control data or user data with the eNodeB 10 through the X2 interface.
  • the UE 20 is a communication terminal that performs reception processing in a resource block for downlink allocated by a base station, such as the eNodeB 10 or the pico eNodeB 30 , and performs transmission processing in a resource block for uplink.
  • a base station such as the eNodeB 10 or the pico eNodeB 30
  • the UE 20 A belongs to the eNodeB 10 A and performs uplink communication and downlink communication with the eNodeB 10 A.
  • the UE 20 B belongs to the pico eNodeB 30 and performs uplink communication and downlink communication with the pico eNodeB 30 .
  • the UE 20 may be a smart phone or may be an information processing device, such as a personal computer (PC), a household image processing device (DVD recorder, video deck, or the like), a personal digital assistant (PDA), a household game apparatus, a household appliance, or the like.
  • the UE 20 may be a mobile communication device, such as a portable phone, a personal handyphone system (PHS), a portable music reproduction device, a portable video processing device, a portable game apparatus, or the like.
  • PHS personal handyphone system
  • FIG. 2 is an explanatory diagram illustrating a 4G frame format.
  • a 10-ms radio frame includes ten 1-ms subframes #0 to #9.
  • Each subframe is a single resource block including 12 sub carriers X 14 orthogonal frequency division multiplexing (OFDM) symbols, and scheduling allocation is performed in units of resource blocks.
  • OFDM symbol is a unit that is used in an OFDM modulation based communication scheme, and is a unit that outputs data processed in one Fast Fourier Transform (FFT).
  • FFT Fast Fourier Transform
  • each subframe includes a control area and a data area.
  • the control area includes the leading 1 to 3 OFDM symbols ( FIG. 2 illustrates an example in which the control area is 3 OFDM symbols), and is used for transmission of a control signal, called a Phy DownLink Control Channel (PDCCH).
  • PDCH Phy DownLink Control Channel
  • the data area following the control area is used for transmission of user data or the like, called a Phy DownLink Shared Channel (PDSCH).
  • PDSCH Phy DownLink Shared Channel
  • a cell-specific reference signal (RS) is arranged in the control area and the data area.
  • the UE 20 may perform channel estimation by receiving the reference signal, and may perform decoding processing of the PDSCH or the like, based on the result of the channel estimation.
  • the UE 20 performs measurement of received power, and basically determines a base station having the highest received power as a connection destination.
  • the pico eNodeB 30 has a transmission power lower than that of the eNodeB 10 .
  • the received power of the eNodeB 10 is frequently high.
  • the opportunity for the UE 20 to belong to the pico eNodeB 30 is reduced.
  • Range expansion is technology for expanding the cell of the pico eNodeB 30 .
  • range expansion is technology that considers the received power of the pico eNodeB 30 as a value greater than an actual measured value by about 20 dB when the UE 20 performs the measurement.
  • FIG. 3 is an explanatory diagram illustrating the range expansion area of the pico eNodeB 30 .
  • range expansion the cell of the pico eNodeB 30 is expanded up to the range expansion area illustrated in FIG. 3 .
  • the opportunity for the UE 20 to belong to the pico eNodeB 30 may be increased.
  • the received power from the eNodeB 10 may be higher than that of the pico eNodeB 30 by about 20 dB. For this reason, it is important to appropriately control interference from the eNodeB 10 .
  • interference control of the data area to which the PDSCH is transmitted, and interference control of the control area to which the PDCCH is transmitted will be described.
  • Inter-Cell Interference Coordination makes it possible to cope with the interference of the data area.
  • the eNodeB 10 may control the interference of the data area in units of resource blocks by exchanging information of a resource block having great interference or a resource block expected to have great interference with the neighboring eNodeBs 10 through the X2 interface.
  • the transmission of the PDCCH is not stopped, and therefore, it has been difficult to use ICIC to avoid the interference of the control area.
  • ABS Almost Blank Subframe
  • FIG. 4 is an explanatory diagram illustrating the subframe set as the ABS.
  • the PDCCH and the PDSCH are not transmitted, and the reference signal of the control area and the reference signal of the data area are transmitted. Therefore, in the subframe set as the ABS by the eNodeB 10 , the interference of both of the control area and the data area of the pico eNodeB 30 is suppressed.
  • ABSs include Multimedia Broadcast multicast Single Frequency Network (MBSFN) type ABSs.
  • MBSFN Multimedia Broadcast multicast Single Frequency Network
  • FIG. 6 is an explanatory diagram illustrating specific examples of configurations. As illustrated in FIG. 6 , in a configuration 1, a first subframe is not set as an ABS, and the ABSs are set to second to eighth subframes. Also, in a configuration 2, first and fifth subframes are not set as ABSs, and the ABSs are set to the second to fourth subframes and sixth to eighth subframes. In a similar manner, in configurations 3 to 5, the ABSs are set according to patterns having cycles of 8 ms.
  • the subframe set as the ABS by the eNodeB 10 A was also considered to be set as the ABS by the eNodeBs 10 B and 10 C.
  • the UE 20 B located near the cell boundary of the eNodeB 10 A received less interference from the neighboring eNodeBs 10 B and 10 C.
  • macro eNodeBs setting the same subframe as the ABS and macro eNodeBs not setting the same subframe as the ABS are mixed among a plurality of neighboring macro eNodeBs.
  • the eNodeB 10 A illustrated in FIG. 1 sets the configuration 2 and the eNodeB 10 B sets the configuration 5
  • the subframe #3 in the eNodeB 10 A is an ABS
  • the subframe #3 in the eNodeB 10 B is not an ABS.
  • the UE 20 B located near the cell boundary of the eNodeB 10 A may receive interference from the eNodeB 10 B in the subframe #3.
  • the first embodiment of the present disclosure was created. According to the first embodiment of the present disclosure, even when the multiple_ABS is introduced, a protection status from the interference of each subframe may be appropriately determined.
  • the first embodiment of the present disclosure will be described in detail.
  • FIG. 7 is a functional block diagram illustrating the configuration of the eNodeB 10 according to the first embodiment of the present disclosure.
  • the eNodeB 10 according to the first embodiment of the present disclosure includes an antenna group 104 , a radio processing unit 110 , a DA/AD conversion unit 120 , a digital processing unit 130 , an ABS setting unit 140 , an X2 communication unit 150 , a configuration retention unit 160 , and an interference determination unit 170 .
  • the antenna group 104 acquires an electrical radio-frequency signal by receiving a radio signal from the UE 20 , and provides the radio-frequency signal to the radio processing unit 110 . Also, the antenna group 104 transmits the radio signal to the UE 20 based on the radio-frequency signal provided from the radio processing unit 110 . Since the eNodeB 10 includes the antenna group 104 having a plurality of antennas, the eNodeB 10 may perform MIMO communication or diversity communication.
  • the radio processing unit 110 converts the radio-frequency signal, which is provided from the antenna group 104 , into a baseband signal (uplink signal) by performing analog processing, such as amplification, filtering, and down-conversion. Also, the radio processing unit 110 converts a baseband signal (downlink signal), which is provided from the DA/AD conversion unit 120 , into a radio-frequency signal.
  • the DA/AD conversion unit 120 converts the analog-format uplink signal, which is provided from the radio processing unit 110 , into a digital format, and provides the digital-format uplink signal to the digital processing unit 130 . Also, the DA/AD conversion unit 120 converts the digital-format downlink signal, which is provided from the digital processing unit 130 , into an analog format, and provides the analog-format downlink signal to the radio processing unit 110 .
  • the digital processing unit 130 performs digital processing on the uplink signal provided from the DA/AD conversion unit 120 , and detects control signal such as PUCCH, or user data such as PUSCH. Also, the digital processing unit 130 generates a digital-format downlink signal for transmission from the eNodeB 10 , and provides the downlink signal to the DA/AD conversion unit 120 .
  • the ABS setting unit 140 sets the ABS by the selection and setting of the configuration described with reference to FIG. 6 .
  • the X2 communication unit 150 is configured to perform communication with another eNodeB 10 or the pico eNodeB 30 through the X2 interface.
  • the X2 communication unit 150 has a function as a setting information reception unit that receives setting information, that is, a configuration, of the ABS of the neighboring eNodeB 10 .
  • the X2 communication unit 150 has a function as a notification unit that notifies the pico eNodeB 30 of information indicating a determination result of an interference protection status for each subframe by the interference determination unit 170 .
  • the configuration retention unit 160 retains the configurations of the neighboring eNodeBs 10 which are received by the X2 communication unit 150 .
  • the interference determination unit 170 determines the interference protection status of the UE 20 , which belongs to the pico eNodeB 30 within the cell of the eNodeB 10 , at each subframe. Specifically, the interference determination unit 170 determines the interference protection status, based on the configuration which is set by the ABS setting unit 140 and the configuration of the neighboring eNodeB 10 which is retained in the configuration retention unit 160 .
  • the interference determination unit 170 determines that the subframe set as the ABS by the serving eNodeB 10 and the neighboring eNodeBs 10 is a protected frame.
  • the interference determination unit 170 determines that the subframe set as the ABS by neither the serving eNodeB 10 nor the neighboring eNodeBs 10 is an unprotected (Not Protected) frame.
  • the interference determination unit 170 may determine that the subframe which is set as the ABS by the neighboring eNodeBs 10 and is not set as the ABS by the serving eNodeB 10 is an unprotected frame.
  • the interference determination unit 170 determines that the subframe which is set as the ABS by the serving eNodeB 10 and is not set as the ABS by the neighboring eNodeBs 10 is a partially protected (Partial Protected) frame, the interference status of which is uncertain.
  • FIG. 8 is an explanatory diagram illustrating a specific example of the determination by the interference determination unit 170 . More specifically, FIG. 8 illustrates an example in which the serving eNodeB 10 A sets configuration 2, and the neighboring eNodeBs 10 B and 10 C set configurations 3 and 4, respectively.
  • the interference determination unit 170 determines that the subframes #2 and #6 are protected frames.
  • the interference determination unit 170 determines that the subframes #1 and #5 are unprotected frames.
  • the interference determination unit 170 determines that the subframes #3 and #7 are unprotected frames.
  • the interference determination unit 170 determines that the subframes #4 and #8 are partially protected frames.
  • the interference determination unit 170 determines the interference protection status of each subframe as described above, the interference determination unit 170 specifies configuration X corresponding to the determination result.
  • the configuration defining a combination including the partially protected frames in the configurations 1 to 5 described with reference to FIG. 6 is added, and the interference determination unit 170 specifies the configuration X corresponding to the determination result from these configurations.
  • the X2 communication unit 150 notifies the pico eNodeB 30 of the configuration X specified by the interference determination unit 170 .
  • the pico eNodeB 30 may appropriately check the interference protection status of each subframe based on one configuration received from the serving eNodeB 10 , without notifying the pico eNodeB 30 of the plurality of configurations of the plurality of eNodeBs 10 .
  • FIG. 9 is a flowchart illustrating the operation of the eNodeB 10 according to the first embodiment of the present disclosure.
  • the ABS setting unit 140 of the serving eNodeB 10 selects a configuration and sets an ABS (S 404 ), and the X2 communication unit 150 receives a configuration of the neighboring eNodeB 10 (S 408 ).
  • the interference determination unit 170 performs determinations indicated in S 412 to S 428 at each subframe.
  • the interference determination unit 170 determines whether a target subframe is set as an ABS by the serving eNodeB 10 (S 412 ). When the target subframe is not set as an ABS by the serving eNodeB 10 , the interference determination unit 170 determines that the corresponding subframe is an unprotected frame (S 416 ).
  • the interference determination unit 170 determines whether the corresponding subframe is set as an ABS by all of the neighboring eNodeBs 10 (S 420 ). When all of the neighboring eNodeBs 10 have set the corresponding subframe as an ABS, the interference determination unit 170 determines that the corresponding subframe is a protected frame (S 424 ). On the other hand, when some of the neighboring eNodeBs 10 have not set the corresponding subframe as an ABS (S 420 ), the interference determination unit 170 determines that the corresponding subframe is a partially protected frame (S 428 ).
  • the interference determination unit 170 specifies the configuration corresponding to the determination result of each subframe, and the X2 communication unit 150 notifies the pico eNodeB 30 of the specified configuration (S 432 ).
  • the interference determination unit 170 may determine that the subframe which is set as the ABS by the neighboring eNodeB 10 and is not set as the ABS by the serving eNodeB 10 is a partially protected frame.
  • the interference determination unit 170 may determine that the subframe which is set as the ABS by the neighboring eNodeB 10 and is not set as the ABS by the serving eNodeB 10 is a partially protected frame.
  • FIG. 10 is an explanatory diagram illustrating the modified example of the determination by the interference determination unit 170 . More specifically, like in FIG. 8 , FIG. 10 illustrates an example in which the serving eNodeB 10 A sets configuration 2, and the neighboring eNodeBs 10 B and 10 C set configurations 3 and 4, respectively.
  • the interference determination unit 170 determines that the subframes #3 and #7 are partially protected frames. Also, since the determination results regarding the subframes #1, #2, #4-6, and #8 are the same as those described with reference to FIG. 8 , a detailed description thereof will be omitted herein.
  • FIG. 11 is a flowchart illustrating the operation according to the modified example.
  • the ABS setting unit 140 of the serving eNodeB 10 selects a configuration and sets an ABS (S 404 ), and the X2 communication unit 150 receives a configuration of the neighboring eNodeB 10 (S 408 ).
  • the interference determination unit 170 performs determinations indicated in S 414 to S 430 at each subframe.
  • the interference determination unit 170 determines whether a target subframe is set as an ABS by all of the eNodeBs 10 including the serving eNodeB 10 and the neighboring eNodeB 10 (S 414 ). When the target subframe is set as an ABS by all of the eNodeBs, the interference determination unit 170 determines that the corresponding subframe is a protected frame (S 418 ).
  • the interference determination unit 170 determines whether the target subframe is set as an ABS by not all but some of the eNodeBs 10 (S 422 ). When the target subframe is not set as an ABS by any of the eNodeBs 10 , the interference determination unit 170 determines that the corresponding subframe is an unprotected frame (S 426 ). On the other hand, when the target subframe is set as an ABS by some of the eNodeBs 10 , the interference determination unit 170 determines that the corresponding subframe is a partially protected frame (S 430 ).
  • the interference determination unit 170 specifies the configuration corresponding to the determination result of each subframe, and the X2 communication unit 150 notifies the pico eNodeB 30 of the specified configuration (S 432 ).
  • the pico eNodeB 30 since the pico eNodeB 30 is notified of the configuration indicating the partially protected frame having the probability of interference, the pico eNodeB 30 , for example, may perform scheduling on the UE 20 located within the range expansion area, while avoiding the partially protected frame, in addition to the unprotected frame.
  • the ABS setting unit 140 sets the configuration at each sector of the eNodeB 10 in cooperation with the neighboring eNodeBs 10 . Specifically, the ABS setting unit 140 of each of the plurality of neighboring eNodeBs 10 sets the same configuration to the sector directed to the central direction of the plurality of corresponding eNodeBs 10 .
  • FIG. 12 a further detailed description will be given with reference to FIG. 12 .
  • FIG. 12 is an explanatory diagram illustrating the application example of the first embodiment.
  • a sector of the eNodeB 10 A that is directed in the central direction of the eNodeBs 10 A to 10 D is a first sector S1A.
  • a sector of the eNodeB 10 B that is directed in the central direction of the eNodeBs 10 A to 10 D is a first sector S1B.
  • a sector of the eNodeB 10 C that is directed in the central direction of the eNodeBs 10 A to 10 D is a first sector S1C.
  • a sector of the eNodeB 10 D that is directed in the central direction of the eNodeBs 10 A to 10 D is a first sector S1D.
  • the ABS setting units 140 of the eNodeBs 10 A to 10 D set the same configuration 2 for the first sector S1A of the eNodeB 10 A, the first sector S1B of the eNodeB 10 B, the first sector S1C of the eNodeB 10 C, and the first sector S1D of the eNodeB 10 D.
  • the ABS setting units 140 of the eNodeBs 10 A and 10 D to 10 F set the same configuration 3 for the first sector S2A of the eNodeB 10 A, the first sector S2D of the eNodeB 10 D, the first sector S1E of the eNodeB 10 E, and the first sector S1F of the eNodeB 10 F.
  • the interference determination unit 170 determines interference based on the configuration set to the sector of each of the plurality of neighboring eNodeBs 10 which is directed in the central direction of the plurality of eNodeBs 10 . For this reason, according to the application example in which the same configuration is set to these sectors, the mixture of the eNodeBs 10 setting the same subframe as an ABS and the eNodeBs 10 not setting the same subframe as an ABS may be avoided. Therefore, the number of partially protected frames may be suppressed. As a result, the throughput of the pico eNodeB 30 may be improved.
  • a configuration suitable for each pico eNodeB 30 may be obtained by determining configurations at each pico eNodeB 30 within an eNodeB 10 - 2 .
  • FIG. 13 is a functional block diagram illustrating a configuration of an eNodeB 10 - 2 according to a second embodiment of the present disclosure.
  • an eNodeB 10 - 2 according to a second embodiment of the present disclosure includes an antenna group 104 , a radio processing unit 110 , a DA/AD conversion unit 120 , a digital processing unit 130 , an ABS setting unit 140 , an X2 communication unit 150 , a configuration retention unit 160 , an interference determination unit 172 , and a position information retention unit 180 .
  • the radio processing unit 110 Since the configurations of the antenna group 104 , the radio processing unit 110 , the DA/AD conversion unit 120 , the digital processing unit 130 , and the ABS setting unit 140 are the same as those described in the first embodiment, a detailed description thereof will be omitted herein.
  • the position information retention unit 180 retains position information of the pico eNodeB 30 within the eNodeB 10 - 2 . Also, the position information of each pico eNodeB 30 may be manually set and may be reported from the pico eNodeB 30 .
  • the interference determination unit 172 determines configuration for notification at each pico eNodeB 30 based on the position information of each pico eNodeB 30 which is retained in the position information retention unit 180 , in addition to configurations of a plurality of eNodeBs 10 - 2 .
  • this point will be described in more detail with reference to FIG. 14 .
  • FIG. 14 is an explanatory diagram illustrating an example of an arrangement of the eNodeB 10 - 2 and the pico eNodeB 30 .
  • the pico eNodeB 30 A is located relatively near the eNodeB 10 - 2 A
  • the pico eNodeB 30 B is located near the cell edge of the eNodeB 10 - 2 A.
  • each pico eNodeB 30 is different, the interference protection status of each pico eNodeB 30 is different even though the combination of the configurations of the respective eNodeBs 10 - 2 is identical.
  • the pico eNodeB 30 A located relatively near the eNodeB 10 - 2 A receives less interference from the neighboring eNodeBs 10 - 2 B and 10 - 2 C.
  • the pico eNodeB 30 B located near the cell edge of the eNodeB 10 - 2 A is expected to receive a relatively large amount of interference from the neighboring eNodeBs 10 - 2 B and 10 - 2 C.
  • the interference determination unit 172 determines the interference protection status of the corresponding subframe based on the position information of each pico eNodeB 30 .
  • the interference determination unit 172 may determine that the non-uniform subframe is a protected frame.
  • the interference determination unit 172 may determine that the non-uniform subframe is an unprotected frame.
  • the interference determination unit 172 may determine that the non-uniform subframe is a partially protected frame.
  • FIG. 15 is a flowchart illustrating the operation of the eNodeB 10 - 2 according to the second embodiment of the present disclosure.
  • the ABS setting unit 140 of the serving eNodeB 10 - 2 selects a configuration and sets an ABS (S 404 ), and the X2 communication unit 150 receives a configuration of the neighboring eNodeB 10 - 2 (S 408 ).
  • the interference determination unit 170 performs determinations indicated in S 436 to S 456 at each subframe.
  • the interference determination unit 172 determines whether a target subframe is set as an ABS by the serving eNodeB 10 - 2 (S 436 ). When the target subframe is not set as an ABS by the serving eNodeB 10 - 2 , the interference determination unit 172 determines that the corresponding subframe is an unprotected frame (S 440 ).
  • the interference determination unit 172 determines whether the corresponding subframe is set as an ABS by all of the neighboring eNodeBs 10 - 2 (S 444 ). When all of the neighboring eNodeBs 10 - 2 have set the corresponding subframe as an ABS, the interference determination unit 172 determines that the corresponding subframe is a protected frame (S 448 ).
  • the interference determination unit 172 determines whether the target pico eNodeB 30 is within a predetermined range from the serving eNodeB 10 - 2 (S 452 ). When the target pico eNodeB 30 is within the predetermined range from the serving eNodeB 10 - 2 , the interference determination unit 172 determines that the corresponding subframe is a protected frame (S 448 ), and when outside of the predetermined range, the interference determination unit 172 determines that the corresponding subframe is an unprotected frame (S 456 ).
  • the interference determination unit 172 specifies the configuration corresponding to the determination result of each subframe, and the X2 communication unit 150 notifies the pico eNodeB 30 of the specified configuration (S 460 ).
  • a configuration suitable for each pico eNodeB 30 may be obtained by determining configurations at each pico eNodeB 30 based on the position information of each pico eNodeB 30 .
  • the interference determination unit 172 may determine the interference protection status based on the distance between the pico eNodeB 30 and the neighboring eNodeB 10 - 2 .
  • the non-uniform subframe which is set as the ABS by the serving eNodeB 10 - 2 and is not set as the ABS by the neighboring eNodeB 10 - 2 is considered.
  • the pico eNodeB 30 receives more interference from the eNodeB 10 - 2 in the corresponding subframe.
  • the interference determination unit 172 may determine that the non-uniform subframe is an unprotected frame.
  • the interference determination unit 172 may determine that the non-uniform subframe is a protected frame.
  • the interference protection status of the corresponding subframe may be determined not on an eNodeB 10 side but on a pico eNodeB 30 side.
  • FIG. 16 is an explanatory diagram illustrating a configuration of a pico eNodeB 30 according to a third embodiment of the present disclosure.
  • a pico eNodeB 30 according to a third embodiment of the present disclosure includes an antenna group 304 , a radio processing unit 310 , a DA/AD conversion unit 320 , a digital processing unit 330 , an X2 communication unit 350 , a configuration retention unit 360 , an interference determination unit 370 , a scheduler 380 , and a measurement result retention unit 390 .
  • the antenna group 304 acquires an electrical radio-frequency signal by receiving a radio signal from the UE 20 , and provides the radio-frequency signal to the radio processing unit 310 . Also, the antenna group 304 transmits the radio signal to the UE 20 , based on the radio-frequency signal provided from the radio processing unit 110 . Since the pico eNodeB 30 includes the antenna group 304 having a plurality of antennas, the pico eNodeB 30 may perform MIMO communication or diversity communication.
  • the radio processing unit 310 converts the radio-frequency signal, which is provided from the antenna group 304 , into a baseband signal (uplink signal) by performing analog processing, such as amplification, filtering, and down-conversion. Also, the radio processing unit 310 converts a baseband signal (downlink signal), which is provided from the DA/AD conversion unit 320 , into a radio-frequency signal.
  • the DA/AD conversion unit 320 converts the analog-format uplink signal, which is provided from the radio processing unit 310 , into a digital format, and provides the digital-format uplink signal to the digital processing unit 330 . Also, the DA/AD conversion unit 320 converts the digital-format downlink signal, which is provided from the digital processing unit 330 , into an analog format, and provides the analog-format downlink signal to the radio processing unit 310 .
  • the digital processing unit 330 performs digital processing on the uplink signal provided from the DA/AD conversion unit 320 , and detects control signal such as PUCCH, or user data such as PUSCH. Also, the digital processing unit 330 generates a digital-format downlink signal for transmission from the pico eNodeB 30 , and provides the downlink signal to the DA/AD conversion unit 320 .
  • the digital processing unit 330 operates as a communication unit together with the DA/AD conversion unit 320 , the radio processing unit 310 , and the antenna group 304 .
  • the X2 communication unit 350 is configured to perform communication with the eNodeB 10 through the X2 interface. For example, the X2 communication unit 350 receives the notification of configuration information, which defines the combination of partially protected frames, from the eNodeB 10 , as described in the first embodiment.
  • the configuration retention unit 360 retains the configuration received from the pico eNodeB 30 by the X2 communication unit 350 .
  • the UE 20 receives the configuration transmitted through the antenna group 304 , performs signal quality measurement according to the received configuration, and reports the measurement result to the pico eNodeB 30 .
  • the measurement result retention unit 390 retains the measurement result reported from the UE 20 as described below.
  • the UE 20 performing the measurement may be any one of UEs 20 belonging to the pico eNodeB 30 and may be a UE 20 located within the range expansion area.
  • the interference determination unit 370 determines, based on the measurement result of the UE 20 , whether each partially protected frame is handled as a protected frame which is protected from interference or an unprotected frame which receives interference. This point will be described later with reference to FIGS. 18 and 19 .
  • the scheduler 380 performs scheduling of the UE 20 , which belongs to the pico eNodeB 30 , according to the determination result by the interference determination unit 370 and the configuration retained by the configuration retention unit 360 . For example, the scheduler 380 allocates only communication resources of protected frames to the UE 20 located within the range expansion area. By such a configuration, it is possible to prevent the UE 20 located within the range expansion area from receiving interference from the eNodeB 10 .
  • the configuration of the pico eNodeB 30 according to the third embodiment of the present disclosure has been described above. Next, the configuration of the UE 20 according to the third embodiment of the present disclosure will be described.
  • FIG. 17 is a functional block diagram illustrating the configuration of the UE 20 according to a third embodiment of the present disclosure.
  • the UE 20 according to the third embodiment of the present disclosure includes an antenna group 204 , a radio processing unit 210 , a DA/AD conversion unit 220 , a digital processing unit 230 , a configuration retention unit 260 , and a measurement management unit 270 .
  • the antenna group 204 acquires an electrical radio-frequency signal by receiving a radio signal from the eNodeB 10 or the pico eNodeB 30 , and provides the radio-frequency signal to the radio processing unit 210 . Also, the antenna group 204 transmits the radio signal to the eNodeB 10 or the pico eNodeB 30 , based on the radio-frequency signal provided from the radio processing unit 210 . Since the UE 20 includes the antenna group 204 having a plurality of antennas, the UE 20 may perform MIMO communication or diversity communication.
  • the radio processing unit 210 converts the radio-frequency signal, which is provided from the antenna group 204 , into a baseband signal (downlink signal) by performing analog processing, such as amplification, filtering, and down-conversion. Also, the radio processing unit 210 converts a baseband signal (uplink signal), which is provided from the DA/AD conversion unit 220 , into a radio-frequency signal.
  • the DA/AD conversion unit 220 converts the analog-format downlink signal, which is provided from the radio processing unit 210 , into a digital format, and provides the digital-format downlink signal to the digital processing unit 230 . Also, the DA/AD conversion unit 220 converts the digital-format uplink signal, which is provided from the digital processing unit 230 , into an analog format, and provides the analog-format uplink signal to the radio processing unit 210 .
  • the digital processing unit 230 performs digital processing on the downlink signal provided from the DA/AD conversion unit 220 , and detects control signal such as PDCCH, or user data such as PDSCH. Also, the digital processing unit 230 generates a digital-format uplink signal for transmission from the UE 20 , and provides the uplink signal to the DA/AD conversion unit 220 .
  • the digital processing unit 230 operates as a communication unit together with the DA/AD conversion unit 220 , the radio processing unit 210 , and the antenna group 204 .
  • the configuration retention unit 260 retains the configuration received from the pico eNodeB 30 . Also, the configuration represents whether each subframe is a protected frame (ABS), an unprotected frame (not ABS), or a partially protected frame.
  • the measurement management unit 270 manages the signal quality measurement according to the configuration retained in the configuration retention unit 260 , and controls the report of the measurement result to the pico eNodeB 30 .
  • the signal quality measurement will be described in more detail.
  • the UE 20 When the subframe defined by the configuration is either of two types, the protected frame or the unprotected frame, the UE 20 performs two types of measurement.
  • the measurement management unit 270 averages the measurement results of the plurality of protected frames, averages the measurement results of the plurality of unprotected frames, and reports the average value of the protected frames and the average value of the unprotected frames to the pico eNodeB 30 as the measurement result.
  • the measurement management unit 270 may independently perform the measurement of each partially protected frame. In other words, the measurement management unit 270 may report the measurement result of each partially protected frame to the pico eNodeB 30 without averaging the measurement result of each partially protected frame.
  • this point will be described in more detail with reference to FIG. 18 .
  • FIG. 18 is an explanatory diagram illustrating a specific example of the signal quality measurement by the third embodiment of the present disclosure.
  • the UE 20 performs measurement in subframes #2, #6 and #10 which are the protected frames (A-1 to A-3), and reports an average value of the measurement result as the measurement result of the protected frames.
  • the UE 20 performs measurement in subframes #1, #5 and #9 which are the unprotected frames (B-1 to B-3), and reports an average value of the measurement result as the measurement result of the unprotected frames.
  • the subframes #3, #4 and #7 which are the partially protected frames, are independently measured.
  • the UE 20 performs measurement in the subframe #3 which is the partially protected frame (C), and reports the measurement result, without averaging the measurement results of other partially protected frames.
  • the UE 20 may average the measurement result of the subframe #3 with the measurement result of other subframes having different cycles from the subframe #3 (for example, a subframe #1 of a next radio frame), even if the subframe is another partially protected frame.
  • the UE 20 performs measurement in the subframe #4 which is the partially protected frame (D), and reports the measurement result without averaging the measurement results of other partially protected frames. Also, the UE 20 performs measurement in the subframe #7 which is the partially protected frame (E), and reports the measurement result without averaging with the measurement results of other partially protected frames. Likewise, the UE 20 performs measurement in the subframe #8 which is the partially protected frame (F), and reports the measurement result without averaging with the measurement results of other partially protected frames.
  • the pico eNodeB 30 may appropriately determine whether to handle the partially protected frame as the protected frame or the unprotected frame.
  • FIG. 19 is an explanatory diagram illustrating an application example of the signal quality measurement. More specifically, FIG. 19 illustrates an example in which the serving eNodeB 10 A sets configuration 2, the neighboring eNodeBs 10 B and 10 C set configurations 3 and 4, respectively, and, as a result, the pico eNodeB 30 is notified of configuration Y by the serving eNodeB 10 A.
  • subframes #3, #4, #7 and #8 are the partially protected frames
  • the same eNodeB 10 B sets the subframes #3 and #7 as ABSs
  • the same eNodeBs 10 A and 10 B set the subframes #4 and #8 as ABSs.
  • the interference protection statuses of the subframes #3 and #7 are considered to be similar
  • the interference protection statuses of the subframes #4 and #8 are also considered to be similar.
  • the UE 20 may perform measurement in the subframes #3 and #7 (C-1, C-2), and report an average value of the measurement result as a measurement result of a group including the subframes #3 and #7.
  • the UE 20 may perform measurement in the subframes #4 and #8 (D-1, D-2), and report an average value of the measurement result as a measurement result of a group including the subframes #4 and #8.
  • the serving eNodeB 10 may group the partially protected frames such that the partially protected frames set as ABSs by the eNodeB 10 of the same pattern constitute the same group, and report the grouping result to the pico eNodeB 30 by, for example, RRC signaling.
  • the pico eNodeB 30 may acquire and report the measurement result of each group as described above.
  • FIG. 20 is a sequence diagram illustrating the operation of the communication system according to the third embodiment of the present disclosure.
  • the eNodeB 10 specifies a configuration by the interference determination unit 170 described in the first embodiment
  • the eNodeB 10 notifies the pico eNodeB 30 of the specified configuration (S 510 ).
  • the pico eNodeB 30 notifies the UE 20 of the configuration received from the eNodeB 10 (S 520 ).
  • the UE 20 acquires the signal quality measurement result of each partially protected frame defined by the configuration (S 530 ), and reports the measurement result to the pico eNodeB 30 (S 540 ).
  • the interference determination unit 370 of the pico eNodeB 30 determines whether to handle each partially protected frame as a protected frame or an unprotected frame based on the reported measurement result (S 550 ).
  • the scheduler 380 of the pico eNodeB 30 performs scheduling on the UE 20 , which belongs to the pico eNodeB 30 , according to the determination result by the interference determination unit 370 (S 560 ).
  • the eNodeB 30 may appropriately check the interference protection status of each subframe based on one configuration notified from the serving eNodeB 10 , without notifying the pico eNodeB 30 of the plurality of configurations of the plurality of eNodeBs 10 . Also, the ABS setting unit 140 of each of the plurality of neighboring eNodeBs 10 sets the same configuration to the sector directed in the central direction of the plurality of corresponding eNodeBs 10 . In this way, the throughput of the pico eNodeB 30 may be improved.
  • the configuration suitable for each pico eNodeB 30 may be obtained by determining configurations at each pico eNodeB 30 located within the eNodeB 10 - 2 .
  • the interference protection status of the corresponding subframe may be determined not on an eNodeB 10 side but on a pico eNodeB 30 side.
  • each step in the processing of the eNodeB 10 and the pico eNodeB 30 need not necessarily be processed in time series in order as described in the sequence diagram or the flowchart.
  • each step in the processing of the eNodeB 10 and the pico eNodeB 30 may be processed in a different order from that described in the flowchart, or may be processed in parallel.
  • the eNodeB 10 , the UE 20 , and the pico eNodeB 30 can be implemented with a computer program capable of executing the same functions as the respective configurations of the eNodeB 10 , the UE 20 , and the pico eNodeB 30 . Also, a recording medium storing the computer program is provided.
  • present technology may also be configured as below.
  • a base station including:
  • a setting unit configured to set a transmission limit frame, in which transmission other than a reference signal is limited, among communication frames
  • a setting information reception unit configured to receive setting information of a transmission limit frame of a neighboring base station
  • a determination unit configured to determine an interference protection status of each communication frame in a cell provided by the base station based on the transmission limit frame set by the setting unit and the transmission limit frame of the neighboring base station.
  • the base station according to (1) wherein the determination unit determines that a communication frame set as the transmission limit frame by any of the base station and the neighboring base station is a protected frame, and determines that a communication frame set as the transmission limit frame by neither the base station nor the neighboring base station is an unprotected frame.
  • the base station according to (5) wherein the determination unit determines that the non-uniform communication frame is a protected frame when the low-transmission-power type base station is within a predetermined range from the base station.
  • the base station according to (5) or (6), wherein the determination unit determines that the non-uniform communication frame is an unprotected frame or a partially protected frame when the low-transmission-power type base station is outside of the predetermined range from the base station.
  • the base station according to any one of (1) to (7), further including a notification unit configured to notify a low-transmission-power type base station which has a transmission power lower than that of the base station and is disposed within the cell of the determination result of the determination unit.
  • a communication method including:
  • a setting unit configured to set a transmission limit frame, in which transmission other than a reference signal from a base station is limited, among communication frames;
  • a setting information reception unit configured to receive setting information of a transmission limit frame of a neighboring base station
  • a determination unit configured to determine an interference protection status of each communication frame in a cell provided by the base station based on the transmission limit frame set by the setting unit and the transmission limit frame of the neighboring base station.
  • determining an interference protection status of a frame based at least in part on information indicating configurations of base stations, wherein a first of the configurations differs from at least a second of the configurations, and wherein a portion of the information indicating the second of the configurations is received from a second base station.
  • (A2) The method of (A2), wherein the first configuration indicates a first pattern of one or more frames of a first type, and/or the second configuration indicates a second pattern of one or more frames of the first type.
  • (A4) The method of (A2), wherein the first type comprises an Almost Blank Subframe (ABS) type.
  • ABS Almost Blank Subframe
  • the frame's interference protection status to be a partially protected status if the first configuration associates the frame with a frame of the first type and at least another of the configurations does not associate the frame with a frame of the first type.
  • the frame's interference protection status to be a partially protected status if at least one of the configurations associates the frame with a frame of the first type and at least another of the configurations does not associate the frame with a frame of the first type;
  • determining the interference protection status of the frame for the communication control device based at least in part on the position of the communication control device comprises determining the interference protection status of the frame based at least in part on whether the communication control device is within a predetermined distance of the base station.
  • each of the configurations associates the frame with a frame of the first type, or if the first configuration associates the frame with a frame of the first type and the communication control device is positioned within a range of a first of the base stations;
  • the frame's interference protection status to be an unprotected status if the first configuration associates the frame with a frame of the first type and at least another of the configurations does not associate the frame with a frame of the first type and the communication control device is not positioned within the range of the first base station,
  • the first configuration is a configuration of the first base station.
  • the first configuration is a configuration of the base station
  • the second configuration is a configuration of the second base station
  • the portion of the information indicating the second configuration is received by the base station.
  • a base station comprising:
  • an interference determination unit configured to determine an interference protection status of a frame based at least in part on information indicating configurations of two or more base stations, wherein a first of the configurations differs from at least a second of the configurations, and wherein a portion of the information indicating the second of the configurations is received from a second base station.
  • the frame's interference protection status to be a partially protected status if the first configuration associates the frame with a frame of the first type and at least another of the configurations does not associate the frame with a frame of the first type.
  • a communication unit configured to send the interference protection status of the frame to a communication control device
  • an associating unit configured to associate the interference protection status with the frame
  • first configuration indicates a first pattern of one or more frames of a first type
  • second configuration indicates a second pattern of one or more frames of the first type
  • the first type comprises an Almost Blank Subframe (ABS) type.
  • ABS Almost Blank Subframe
  • the frame's interference protection status to be a partially protected status if at least one of the configurations associates the frame with a frame of the first type and at least another of the configurations does not associate the frame with a frame of the first type;
  • a communication unit configured to send the interference protection status of the frame to a communication control device
  • an associating unit configured to associate the interference protection status with the frame
  • first configuration indicates a first pattern of one or more frames of a first type
  • second configuration indicates a second pattern of one or more frames of the first type
  • the first type comprises an Almost Blank Subframe (ABS) type.
  • ABS Almost Blank Subframe
  • a communication unit configured to send the interference protection status of the frame to a communication control device
  • an associating unit configured to associate the interference protection status with the frame
  • first configuration indicates a first pattern of one or more frames of a first type
  • second configuration indicates a second pattern of one or more frames of the first type
  • the first type comprises an Almost Blank Subframe (ABS) type.
  • ABS Almost Blank Subframe
  • the first configuration is a configuration of the base station
  • the second configuration is a configuration of the second base station
  • the portion of the information indicating the second configuration is received by the base station.
  • determining an interference protection status of a frame based at least in part on information indicating configurations of base stations, wherein a first of the configurations differs from at least a second of the configurations, and wherein a portion of the information indicating the second of the configurations is received from a second base station.
  • a wireless communication system comprising:
  • a first base station including an interference determination unit
  • the first base station is configured to store information indicating a first configuration
  • the second base station is configured to store information indicating a second configuration
  • the interference determination unit of the first base station is configured to determine an interference protection status of a frame based at least in part on the information indicating the first configuration of the first base station and the information indicating the second configuration of the second base station, and
  • the first configuration differs from the second configuration.
  • the first, second, and third base stations are configured to store information indicating a third configuration
  • the third configuration corresponds to a cell that is centrally located with respect to the first, second, and third base stations, and
  • the first, second, and third base stations each transmit signals in the cell according to the third configuration.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)
US14/364,445 2011-12-28 2012-12-25 Base station, communication method and program Active 2033-03-28 US9392585B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2011-288780 2011-12-28
JP2011288780A JP5842608B2 (ja) 2011-12-28 2011-12-28 基地局、通信方法およびプログラム
PCT/JP2012/008264 WO2013099218A1 (en) 2011-12-28 2012-12-25 Protected subframe in presence of multiple different abs patterns

Publications (2)

Publication Number Publication Date
US20140301349A1 US20140301349A1 (en) 2014-10-09
US9392585B2 true US9392585B2 (en) 2016-07-12

Family

ID=47594962

Family Applications (1)

Application Number Title Priority Date Filing Date
US14/364,445 Active 2033-03-28 US9392585B2 (en) 2011-12-28 2012-12-25 Base station, communication method and program

Country Status (16)

Country Link
US (1) US9392585B2 (zh)
EP (1) EP2742769B1 (zh)
JP (1) JP5842608B2 (zh)
KR (1) KR101930119B1 (zh)
CN (1) CN104012165B (zh)
AR (1) AR089423A1 (zh)
AU (1) AU2012359766A1 (zh)
BR (1) BR112014015136A8 (zh)
CA (1) CA2849058A1 (zh)
ES (1) ES2678207T3 (zh)
IN (1) IN2014CN04658A (zh)
MX (1) MX2014007515A (zh)
RU (1) RU2599343C2 (zh)
TW (1) TWI492655B (zh)
WO (1) WO2013099218A1 (zh)
ZA (1) ZA201403501B (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10244539B2 (en) * 2014-08-27 2019-03-26 Samsung Electronics Co., Ltd. Wireless communication system and method for managing resource for interference coordination therein

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013062362A1 (ko) * 2011-10-26 2013-05-02 엘지전자 주식회사 무선 통신 시스템에서 셀간 간섭 조정 방법 및 장치
JP5957883B2 (ja) 2011-12-28 2016-07-27 ソニー株式会社 通信制御装置、通信方法およびプログラム
CN104602347B (zh) 2013-10-31 2019-09-17 株式会社Ntt都科摩 在多个资源块上对小区进行协调的方法和设备
TWI705669B (zh) * 2018-12-24 2020-09-21 財團法人工業技術研究院 基地台間干擾協調裝置、方法，和非揮發性電腦可讀媒體

Citations (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0986282A1 (en) 1998-04-17 2000-03-15 Matsushita Electric Industrial Co., Ltd. Radio communication device and method of controlling transmission rate
US20050100119A1 (en) 2003-11-07 2005-05-12 Atheros Communications, Inc. Adaptive interference immunity control
EP2259466A2 (en) 2009-06-05 2010-12-08 Hitachi, Ltd. Radio communication system, base station and mobile station
US20110116480A1 (en) 2009-11-13 2011-05-19 Samsung Electronics Co., Ltd. Methods and apparatus to support interference management in multi-tier wireless communication systems
US20110151790A1 (en) 2009-12-18 2011-06-23 Qualcomm Incorporated Wireless communication channel blanking
JP2011521512A (ja) 2008-04-07 2011-07-21 クゥアルコム・インコーポレイテッド ユニキャスト情報を送信するためにｍｂｓｆｎサブフレームを使用するための方法及び装置
WO2011116480A1 (en) 2010-03-24 2011-09-29 Normerica Inc. Food composition comprising germinated seeds or grains
WO2011122833A2 (en) 2010-03-29 2011-10-06 Lg Electronics Inc. Method and apparatus for measurement for inter-cell interference coordination in radio communication system
WO2011130447A1 (en) 2010-04-13 2011-10-20 Qualcomm Incorporated Resource partitioning information for enhanced interference coordination
US20110305295A1 (en) 2010-06-11 2011-12-15 Samsung Electronics Co. Ltd. Method and apparatus for transmitting csi-rs and data using partial muting of csi-rs
US20110310830A1 (en) 2010-06-18 2011-12-22 Mediatek Inc. Method for Coordinating Transmissions Between Different Communications Apparatuses and Communication Sapparatuses Utilizing the Same
US20110310802A1 (en) 2010-06-21 2011-12-22 Qualcomm Incorporated Adaptive resource partitioning information (arpi) transition behavior in heterogeneous networks
US20120106476A1 (en) * 2010-10-29 2012-05-03 Qualcomm Incorporated Methods and apparatus for defining and using sequences for resource sets for enhanced inter-cell interference coordination
US20120113843A1 (en) * 2010-11-05 2012-05-10 Interdigital Patent Holdings, Inc. Methods, apparatus and systems for applying almost blank subframe (abs) patterns
US20130225192A1 (en) * 2010-11-12 2013-08-29 Sumitomo Electric Industries, Ltd. Base station device, communication system, management device, and methods relating to the same
US20130258895A1 (en) * 2010-12-07 2013-10-03 Lg Electronics Inc. Method for controlling inter-cell interference in a wireless communication system that supports a plurality of component carriers, and base station apparatus for same
US20140341058A1 (en) 2011-12-28 2014-11-20 Sony Corporation Communication control device, communication method, communication terminal and program

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100724911B1 (ko) * 2004-08-17 2007-06-04 삼성전자주식회사 통신 시스템에서 인접 기지국 정보의 구성과 송수신 방법 및 시스템
WO2011046350A2 (ko) * 2009-10-12 2011-04-21 한국전자통신연구원 인접 셀 간섭 제어 방법 및 간섭 제어 장치
KR101670746B1 (ko) * 2009-12-15 2016-11-09 엘지전자 주식회사 무선 통신 시스템에서의 멀티캐스트 및 브로드캐스트 서비스 데이터를 위한 자원 할당 방법 및 이를 위한 장치
KR101819502B1 (ko) * 2010-02-23 2018-01-17 엘지전자 주식회사 간섭 측정 방법 및 단말과, 간섭 정보 수신 방법 및 기지국
US8730827B2 (en) * 2010-03-05 2014-05-20 Intel Corporation Estimating quality of a signal in mobile wireless communication systems
JP5114523B2 (ja) * 2010-04-05 2013-01-09 株式会社エヌ・ティ・ティ・ドコモ 基地局装置、移動端末装置及び通信制御方法

Patent Citations (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0986282A1 (en) 1998-04-17 2000-03-15 Matsushita Electric Industrial Co., Ltd. Radio communication device and method of controlling transmission rate
US20050100119A1 (en) 2003-11-07 2005-05-12 Atheros Communications, Inc. Adaptive interference immunity control
JP2011521512A (ja) 2008-04-07 2011-07-21 クゥアルコム・インコーポレイテッド ユニキャスト情報を送信するためにｍｂｓｆｎサブフレームを使用するための方法及び装置
EP2259466A2 (en) 2009-06-05 2010-12-08 Hitachi, Ltd. Radio communication system, base station and mobile station
US20110116480A1 (en) 2009-11-13 2011-05-19 Samsung Electronics Co., Ltd. Methods and apparatus to support interference management in multi-tier wireless communication systems
US20110151790A1 (en) 2009-12-18 2011-06-23 Qualcomm Incorporated Wireless communication channel blanking
WO2011116480A1 (en) 2010-03-24 2011-09-29 Normerica Inc. Food composition comprising germinated seeds or grains
US20130033998A1 (en) * 2010-03-29 2013-02-07 Inkwon Seo Method and apparatus for measurement for inter-cell interference coordination in radio communication system
WO2011122833A2 (en) 2010-03-29 2011-10-06 Lg Electronics Inc. Method and apparatus for measurement for inter-cell interference coordination in radio communication system
WO2011130447A1 (en) 2010-04-13 2011-10-20 Qualcomm Incorporated Resource partitioning information for enhanced interference coordination
JP2013526154A (ja) 2010-04-13 2013-06-20 クゥアルコム・インコーポレイテッド 拡張干渉協調のためのリソース区分情報
US20110305295A1 (en) 2010-06-11 2011-12-15 Samsung Electronics Co. Ltd. Method and apparatus for transmitting csi-rs and data using partial muting of csi-rs
JP2013534094A (ja) 2010-06-18 2013-08-29 聯發科技股▲ふん▼有限公司 通信装置間の協調伝送方法とそれを用いた通信装置
US20110310830A1 (en) 2010-06-18 2011-12-22 Mediatek Inc. Method for Coordinating Transmissions Between Different Communications Apparatuses and Communication Sapparatuses Utilizing the Same
WO2011157236A1 (en) 2010-06-18 2011-12-22 Mediatek Inc. Method for coordinating transmissions between different communications apparatuses and communication sapparatuses utilizing the same
US20110310802A1 (en) 2010-06-21 2011-12-22 Qualcomm Incorporated Adaptive resource partitioning information (arpi) transition behavior in heterogeneous networks
US20120106476A1 (en) * 2010-10-29 2012-05-03 Qualcomm Incorporated Methods and apparatus for defining and using sequences for resource sets for enhanced inter-cell interference coordination
US20120113843A1 (en) * 2010-11-05 2012-05-10 Interdigital Patent Holdings, Inc. Methods, apparatus and systems for applying almost blank subframe (abs) patterns
US20130225192A1 (en) * 2010-11-12 2013-08-29 Sumitomo Electric Industries, Ltd. Base station device, communication system, management device, and methods relating to the same
US20130258895A1 (en) * 2010-12-07 2013-10-03 Lg Electronics Inc. Method for controlling inter-cell interference in a wireless communication system that supports a plurality of component carriers, and base station apparatus for same
US20140341058A1 (en) 2011-12-28 2014-11-20 Sony Corporation Communication control device, communication method, communication terminal and program

Non-Patent Citations (15)

* Cited by examiner, † Cited by third party
Title
No Author Listed, Ericsson et al., "On blank MBSFN subframes for eICIC", 3rd Generation Partnership Project (3GPP) Draft; R4-113830, vol. RAN WG4, Bucharest, Romania, Jun. 27-Jul. 1, 2011, 4 pages.
No Author Listed, Fujitsu, "Signalling Design for Almost Blank Subframe Patters", 3rd Generation Partnership Project (3GPP) Draft; R2-110457, vol. RAN WG2, Dublin, Ireland, Jan. 17-21, 2011, 4 pages.
No Author Listed, NEC, "Considerations on UE demodulation and CSI verification for eICIC", 3rd Generation Partnership Project (3GPP) Draft; R4-113727, vol. RAN WG4, Bucharest, Romania, Jun. 27-Jul. 1, 2011, 6 pages.
No Author Listed, Nokia Siemens Networks et al., "Network-to-UE signalling for TDM eICIC", 3rd Generation Partnership Project (3GPP) Draft; R2-106223, vol. RAN WG2, Jacksonville, US, Nov. 15-19, 2010, 8 pages.
No Author Listed, Nokia Siemens Networks et al., "On TDM eICIC Coordination for Macro+Pico Cases", 3rd Generation Partnership Project (3GPP) RAN WG3 #69-BIS Meeting. Xi'an, China, Oct. 11-15, 2010. 6 pages.
No Author Listed, NTT DoCoMo, "Remaining issues on eICIC for Re1-10", 3rd Generation Partnership Project (3GPP) Draft; R1-106184, vol. RAN WG1, Jacksonville, USA, Nov. 15-19, 2010, 6 pages.
No Author Listed, Potevio, "Further Consideration on Two Scenarios of Non CA-based ICIC", 3rd Generation Partnership Project (3GPP) Draft; R2-114146, vol. TSG RAN2, Athens, Greece, Aug. 22-26, 2011, 2 pages.
No Author Listed, Qualcomm Europe "Subframe specific channel quality reporting", 3rd Generation Partnership Project (3GPP) TSG-RAN WG1 #59. R1-094998. Nov. 9-13, 2009. 5 pages.
No Author Listed, Qualcomm Incorporated, "eICIC for a pico eNB with multiple interfering macro eNBs", 3rd Generation Partnership Project (3GPP) Draft; R3-103415, vol. RAN WG3, Jacksonville, USA, Nov. 15-19, 2010, 2 pages.
No Author Listed, Qualcomm Incorporated, "Overview of eICIC backhaul procedure", 3rd Generation Partnership Project (3GPP) Draft; R3-103414, vol. RAN W63, Jacksonville, USA, Nov. 15-19, 2010, 4 pages.
No Author Listed, RAN1, "Way Forward on time-domain extension of Rel 8/9 backhaul-based ICIC", 3rd Generation Partnership Project (3GPP) Draft; R1-105779, vol. RAN WG1, Xi'an, P.R. China, Oct. 11-15, 2010, 4 pages.
No Author Listed, Renesas Mobile Europe Ltd., Discussion on Rel' 11 eICIC Scenarios, 3rd Generation Partnership Project (3GPP) TSG-RAN WGI #66, R1-112798, Athens, Greece, Aug. 22-26, 2011, 14 pages.
No Author Listed, Samsung, "Need of common ABS subset", 3rd Generation Partnership Projet (EGPP) Draft; R2-110424, vol. RAN WG2, Dublin, Ireland, Jan. 17-21, 2011, 4 pages.
No Author Listed, ZTE, "Discussion on measurement restriction of eICIC", 3rd Generation Partnership Project (3GPP) Draft; R2-106332, vol. RAN WG2, Jacksonville, USA, Nov. 15-19, 2010, 6 pages.
Singaporean Written Opinion mailed Mar. 9, 2016 in connection with Singaporean Application No. 11201403462W.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10244539B2 (en) * 2014-08-27 2019-03-26 Samsung Electronics Co., Ltd. Wireless communication system and method for managing resource for interference coordination therein
US10966210B2 (en) 2014-08-27 2021-03-30 Samsung Electronics Co., Ltd. Wireless communication system and method for managing resource for interference coordination therein

Also Published As

Publication number Publication date
WO2013099218A1 (en) 2013-07-04
CN104012165B (zh) 2018-06-19
CA2849058A1 (en) 2013-07-04
EP2742769B1 (en) 2018-05-30
AU2012359766A1 (en) 2014-03-20
AU2012359766A8 (en) 2014-11-27
US20140301349A1 (en) 2014-10-09
KR20140124749A (ko) 2014-10-27
TW201340768A (zh) 2013-10-01
BR112014015136A2 (pt) 2017-06-13
TWI492655B (zh) 2015-07-11
JP5842608B2 (ja) 2016-01-13
ES2678207T3 (es) 2018-08-09
MX2014007515A (es) 2014-08-29
BR112014015136A8 (pt) 2017-07-04
EP2742769A1 (en) 2014-06-18
AR089423A1 (es) 2014-08-20
JP2013138364A (ja) 2013-07-11
ZA201403501B (en) 2014-11-26
CN104012165A (zh) 2014-08-27
RU2014125252A (ru) 2015-12-27
IN2014CN04658A (zh) 2015-09-18
KR101930119B1 (ko) 2018-12-17
RU2599343C2 (ru) 2016-10-10

Similar Documents

Publication Publication Date Title
US9584292B2 (en) Communication control device, communication method, communication terminal and program that determines protection status from interference of each communication frame
US11349619B2 (en) Configuring reference signal transmission in wireless communications
US9949255B2 (en) Communication device and communication method for determining a combination of base stations used to communicate with a communication terminal
CN110476450B (zh) 用户终端以及无线通信方法
US10327282B2 (en) Network node, a wireless device and methods therein for selecting a communication mode in a wireless communications network
US10187843B2 (en) Communication control device, communication control method, and program
US20130109384A1 (en) Base station apparatus, mobile terminal apparatus and communication control method
CN110392385B (zh) 通信方法及相关设备
US20130286964A1 (en) Method of Configuring CSI-RS for Coordinated Multiple Point Interference Measurement and Related Communication Device
JP5781016B2 (ja) 無線基地局、無線通信システム及び無線通信方法
US9392585B2 (en) Base station, communication method and program
US10512117B2 (en) Computer program, computer-readable storage medium, first transmission point and method performed therein

Legal Events

Date Code Title Description
AS Assignment

Owner name: SONY CORPORATION, JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:TAKANO, HIROAKI;REEL/FRAME:033259/0574

Effective date: 20140226

FEPP Fee payment procedure

Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

STCF Information on status: patent grant

Free format text: PATENTED CASE

MAFP Maintenance fee payment

Free format text: PAYMENT OF MAINTENANCE FEE, 4TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1551); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

Year of fee payment: 4

FEPP Fee payment procedure

Free format text: MAINTENANCE FEE REMINDER MAILED (ORIGINAL EVENT CODE: REM.); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY